[Viliam1234]

I suppose a typical nomadic society is not like "mother and father with kids, the nearest relative a few miles away".

Childcare is easier when you have a group of adults taking care of a group of kids. And of course, parents have the primary responsibility, but it is not a 24 hour duty.

[Nomentatus]

That counts, but parents spend most of their time with their kids. Moms gather and the kids come along and help to an extent. If you can take your children to work and interact with them while you're working, that's huge.

The upshot is that we have to do everything we can to give our children more of our time; we aren't a desperately poor society, we can do more. We have wandered far from our "species essence" and now wonder why so much is going wrong.